This is clue one, Units #1 & #2. I gave this clue in January, 4-patches and half-square triangles.
And clue two was given this month at the guild meeting. Units #3 & #4 are more half-square triangles and quarter-half triangles.
I'm sure many of you are beginning to recognize this design. If you know who the designer is and which quilt this is...please do not spoil it for the others in the comments (but feel free to comment otherwise - just please don't give it away). I'll give the designer credit at the end of our mystery, of course!
I'd be happy to answer any questions and/or discuss this with you through email :)
Linking up to Sew Darn Crafty @ Sew Many Ways